Artesyn ATCA-7350 Installation and Use (September 2014) - Manual (Page 36)

Hardware Preparation and Installation
ATCA-7350 Installation and Use (6806800G59G) 36
2.5.2 Removing Blank Filler Blades
 After you remove a blank filler blade, store it in the equipment room or a damp-proof
and dust-proof place.
 After you remove a blade from the shelf, install a blank filler blade in vacant slot.
Otherwise, the functions such as ventilation, heat dissipation, electromagnetic shield,
and dust proof may be affected.
 For a newly-delivered shelf, you can remove all blank filler blades and then install blades
in all slots when the shelf is not powered on.
 If a shelf is powered on, you can remove a blank filler blade and then install a blade. In
this way, install multiple blades one by one.